Recent questions

Q. 103 A rigid tank of $2 \mathrm{~m}^{3}$ internal volume contains $5 \mathrm{~kg}$ of water as a saturated liquid-vapor mixture at $400 \mathrm{kPa}$. Half of the mass ...

Q. 104 Consider a spark ignition engine which operates on an ideal air-standard Otto cycle. It uses a fuel which produces $44 \mathrm{MJ} / \mathrm{kg}$ of heat in the en...

Q. 105 A refrigerator operates on an ideal vapor compression cycle between the pressure limits of $140 \mathrm{kPa}$ and $800 \mathrm{kPa}$. The working fluid is the refr...

Q. 106A steam power plant operates on a simple ideal Rankine cycle. The condenser pressure is $10 \mathrm{kPa}$ and the boiler pressure is $5 \mathrm{MPa}$. The steam ent...

Q. 107In an air-conditioning system, air enters at $20{ }^{\circ} \mathrm{C}$ and $30 \%$ relative humidity at a steady rate of $30 \mathrm{~m}^{3} / \mathrm{min}$ in a h...

Q. 108 An office uses a heat pump to receive $500 \mathrm{~kJ} /$ day heat in winter to maintain its temperature at $300 \mathrm{~K}$. The ambient temperature is $280 \ma...

Q. 109In a liquid-vapour phase change process, $\left(\frac{\mathrm{d} P}{\mathrm{~d} T}\right)_{\text {sat }}$ at $100{ }^{\circ} \mathrm{C}$ for saturated water is $375...

\begin{tabular}{|l|l|}\hline Q.110 & Which one of the monomers given is used in the synthesis of cellulose? \\\hline & \\\hline& Fructose \\\hline& Lactic acid \\\hline& ...

\begin{tabular}{|l|l|}Q. 111 & \begin{tabular}{l}A copper wire upon loading instantaneously increases in length to $l$, and then \\continues to elongate gradually. Upon u...

\begin{tabular}{|l|l|}Q. 112 & Consider the structure of a crosslinked polymer shown in the figure. From the \\options given, identify the monomers that are used in the s...

\begin{tabular}{l|l}Q. 113 & \begin{tabular}{l}Among the options given, choose the most suitable compatibilizer for blending \\Polyvinylidene fluoride (PVDF) and Acryloni...

\begin{tabular}{|c|c|c|c|c|}\hline \multirow[t]{3}{*}{ Q. 114} & \multicolumn{4}{|c|}{\begin{tabular}{l}A high molecular weight polymer passes through different zones fro...

\begin{tabular}{|l|l|}Q.115 & \begin{tabular}{l}Polymer wetting is improved by the addition of fillers with functional groups. In a \\typical case-study, natural-clay was...

\begin{tabular}{|c|c|c|c|c|}\hline \multirow[t]{6}{*}{ Q. 116} & \multicolumn{4}{|c|}{\begin{tabular}{l}Among the options given, identify the correct match between the po...

\begin{tabular}{|c|c|c|}\hline \multirow[t]{2}{*}{ Q. 117} & \multicolumn{2}{|c|}{ What is the correct order of decreasing crystallinity of the given polymers? } \\\hline...

\begin{tabular}{l|l|}Q. 118 & Choose the correct option that best correlates the graphs with the polymerization \\methods. \\\hline& $\mathrm{P}$ - living polymerization;...

\begin{tabular}{|c|c|c|c|c|}\hline \multirow[t]{6}{*}{ Q. 119} & \multicolumn{4}{|c|}{\begin{tabular}{l}From the options given, identify the correct match(es) between the...

\begin{tabular}{l|l}Q.120 & Among the options given, which agents are used to vulcanize or cure rubbers? \\\hline& Dicumyl peroxide \\\hline& Zinc stearate \\\hline& Carb...

\begin{tabular}{l|l}Q.121 & \begin{tabular}{l}Lipase is a natural enzyme, which cleaves carboxylic ester bonds. Among the \\options given, identify the polymer(s) degrade...

\begin{tabular}{l|l}Q. 122 & \begin{tabular}{l}Among the options given, identify the correct pair(s) of catalyst and co-catalyst \\that form a Ziegler-Natta catalyst.\end...

\begin{tabular}{|c|c|c|c|c|}\hline \multirow[t]{2}{*}{ Q. 123} & \multicolumn{4}{|c|}{\begin{tabular}{l}Mechanical stress is applied on a polymer. Identify the correct ma...

\begin{tabular}{|c|c|}\hline Q. 124 & \begin{tabular}{l}Stress versus elongation profiles for different polymeric materials are shown in the \\figure. Choose the combinat...

\begin{tabular}{l|l}Q.125 & \begin{tabular}{l}Among the options given, which method(s) is/are used for the synthesis of atactic \\polystyrene?\end{tabular} \\\hline& Free...

Q. 126 A nylon sample of $0.03 \mathrm{~m}^{2}$ cross-sectional area is subjected to a creep load of $10 \mathrm{kN}$. The load is removed after a duration of $60 \mathrm...

Q. 127 Polyvinylidine fluoride (PVDF) was quenched from the melt in one case and in the other case, it was slowly cooled from the melt at $10^{\circ} \mathrm{C} / \mathrm...

Q. 128 A polymeric material of density $0.9 \mathrm{~g} / \mathrm{cc}$ and melt volume of $10 \mathrm{cc}$ in an extruder has a residence time of $100 \mathrm{~s}$. The o...

Q. 129 A polymer weighing $0.2 \mathrm{~g}$ is dissolved in $100 \mathrm{ml}$ of benzene and has a relative viscosity of 1.5 . The polymer obeys Mark-Houwink equation wit...

Q. 130 A continuous and aligned glass-fiber reinforced composite consists of $40 \mathrm{vol} \%$ of glass-fiber having a modulus of elasticity of $69 \mathrm{GPa}$ and $...

Q. 131The molar mass distribution of a polymer is\begin{tabular}{|l|l|}\hline Number of molecules & Molar mass (g/mol) \\\hline 100 & 7500 \\\hline 50 & 5000 \\\hline\end...

\begin{tabular}{l|l}Q.132 & Choose the correct group of fat soluble vitamins \\\hline& Cholecalciferol, $\alpha$-Tocopherol, Menadione \\\hline& Thiamine, Cholecalciferol...

\begin{tabular}{l|l}Q.133 & The synthesis of thyroxine T4 in human body requires \\\hline& Selenium \\\hline& Iodine \\\hline& Iron \\\hline& Zinc\end{tabular}

\begin{tabular}{|l|l|}\hline Q.134 & Which among the followings is NOT an essential amino acid? \\\hline& L-Phenylalanine \\\hline& L-Valine \\\hline& L-Lysine \\\hline& ...

\begin{tabular}{|l|l|}Q.135 & \begin{tabular}{l}The time required for stipulated destruction of a microbial population at a given \\temperature is\end{tabular} \\\hline& ...

\begin{tabular}{l|l}Q. 136 & Which among the following statements is NOT correct? \\\hline& Cod fish is a major source of $\omega-3$ fatty acids. \\\hline& Beetroot is a ...

\begin{tabular}{l|l}Q. 137 & Which of the following statements is NOT correct? \\\hline& \begin{tabular}{l}As the shear rate increases, the apparent viscosity decreases f...

Q. 138 Calculate the efficiency in percent (rounded off to 1 decimal place) of an oil expeller which yields $37 \mathrm{~kg}$ oil containing $5 \%$ solid impurities from ...

\begin{tabular}{|c|c|}\hline Q. 139 & \begin{tabular}{l}Orange juice is packaged aseptically and stored under ambient conditions. The \\degradation of vitamin $\mathrm{C}...

Q. 140 The weight of $10 \mathrm{~kg}$ dried cauliflower containing 5\% moisture (wet basis) after rehydration is $60 \mathrm{~kg}$. If the fresh cauliflower contained $8...

\begin{tabular}{|c|c|c|}\hline \multirow[t]{2}{*}{ Q. 141} & \multicolumn{2}{|c|}{\begin{tabular}{l}Match the industrial product in Column I with fermentative organism in...

\begin{tabular}{|c|c|c|c|}\hline \multirow[t]{2}{*}{ Q. 142} & \multicolumn{3}{|c|}{\begin{tabular}{l}Match the enzyme in Column I with its application in food processing...